Washbasin siphon VIEGA 111298 S‑shape chrome – 25 mm connection

The VIEGA washbasin siphon model 111298 is an S‑shaped chrome drain fitting designed for washbasin waste connections with a 25 mm outlet. It functions as a compact S‑trap that creates and maintains a water seal to prevent sewer gases entering the room. Finished in chrome for corrosion resistance and a smooth appearance, this siphon is intended for domestic and light commercial bathroom installations where space behind the basin is limited and a direct downward connection to the soil pipe is required.

Advantages

The chrome construction offers surface durability and ease of cleaning while the S‑shape provides a reliable water trap in compact installation conditions. The 25 mm outlet matches standard small-diameter basin wastes, enabling straightforward connection without additional adapters in compatible systems. The siphon’s compact form factor reduces visible pipework under the basin and simplifies retrofit or replacement work where an S‑trap configuration is specified.

Suitable for

• Domestic bathroom washbasins with limited rear space
• Small commercial washrooms where a compact siphon is needed
• Replacement of existing S‑trap configurations
• Installations requiring a 25 mm outlet connection

Key specifications

• Design: S‑shaped siphon (S‑trap)
• Finish: chrome plated metal
• Outlet diameter: 25 mm
• Application: washbasin drain connection
• Function: water seal to prevent sewer gases

How to use

Install the siphon between the basin outlet and the waste pipe so that the 25 mm outlet aligns with the basin waste tailpiece and the lower connection fits the soil pipe. Ensure all compression fittings or slip connections are tightened to manufacturer torque recommendations and that sealing washers or tape are applied where required. After installation, run water through the basin and inspect all joints for leaks; adjust alignment and retighten connections if necessary to maintain the water seal and prevent drips.

Usage recommendations

Use in accordance with local plumbing codes: ensure venting requirements are met for S‑trap installations and verify compatibility with the building’s drainage layout. Periodically inspect the siphon for debris buildup and clean as needed to maintain flow and the integrity of the water seal.